GeForce GTS 450 vs GeForce GTX 260 216SP 55 nm

Intro

Compare that to the GeForce GTX 260 216SP 55 nm, which features GPU core speed of 576 MHz, and 896 MB of GDDR3 RAM set to run at 999 MHz through a 448-bit bus. It also is made up of 216 SPUs, 72 Texture Address Units, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450		106 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 65 Watts (61%)

Memory Bandwidth

Performance-wise, the GeForce GTX 260 216SP 55 nm should theoretically be quite a bit better than the GeForce GTS 450 overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
GeForce GTS 450		57728 MB/sec
	Difference: 54160 (94%)

Texel Rate

The GeForce GTX 260 216SP 55 nm is a lot (more or less 66%) better at texture filtering than the GeForce GTS 450. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
GeForce GTS 450		25056 Mtexels/sec
	Difference: 16416 (66%)

Pixel Rate

The GeForce GTX 260 216SP 55 nm should be a lot (approximately 29%) more effective at anti-aliasing than the GeForce GTS 450, and will be able to handle higher screen resolutions better. (explain)

GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
GeForce GTS 450		12528 Mpixels/sec
	Difference: 3600 (29%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.